OOptics Express15d agoChromatic Focus Variation measurements realised using a metasurface for the focal shiftpengqian yang·Xiangqian Jiang·Andrew; id_orcid 0000-0002-9941-4451 Henning·James Williamson·Dawei Tang·Haydn MartinRead at Optics ExpressTagsMetamaterials and Metasurfaces ApplicationsElectronic, Optical and Magnetic Materials